Aldo,
This is your cousin's twins babtisim day. This isn't about YOU being comfortable or NOT being bored. It is about showing that since you aren't drinking you are a BETTER person than the one who is a "drunken problem."
Just might be a chance for you to prove to yourself that you have a really great and UNSELFISH fellow hidden deep down inside. Go and be the best person you can be and you will be proud of who you are becoming.
Jon